Tomato Mosaic Virus
Tomato mosaic virus (TMV) infected plants have a green/yellow mottled appearance and are usually stunted. Infected fruit may have necrotic brown patches on them.
The virus is most commonly transmitted by handling or mechanical damage. Workers who smoke may infect plants with virus particles left on their hands after handling cigarettes. A variety of insects can also transmit the disease from infected weeds in the Solanaceae. Avoid planting in a field where infected tomato or tobacco plants were grown, and in greenhouse situations, all pruning equipment should be steam sterilized regularly. Use resistant varieties.